PEORIA — A man in his 20s received a minor injury when he was grazed in the buttock by a bullet Tuesday afternoon in South Peoria.

Police were alerted to the situation by ShotSpotter, the gunshot detection technology installed in November. That system pinpointed the location of the incident as 809 W. John Gwynn Jr. Ave. The call for three rounds fired came in at 1:52 p.m.

When officers arrived, they didn’t initially find evidence of a shooting, according to Lt. Earnest McCall. A witness eventually told police the victim, Andrew C. Dunn, ran into an apartment across the street in the 100 block of Merriman Court.

Dunn was found with the wound to his buttock.

“We’re not for sure if that was a result of the shooting or not,” McCall said. “He’s not giving us any information.”

It also was not clear whether the wound may have been accidentally self-inflicted or received from another person.

Dunn was transported to OSF Saint Francis Medical Center by ambulance. He was treated and released.

The incident remained under investigation Tuesday afternoon with no arrests and no suspects in custody.

The shooting Tuesday afternoon was at least the seventh incident of shots fired in the city recorded by ShotSpotter or called in by residents since Monday morning, according to police records. No other injuries were reported.